Title: Blank screen when saving custom CSS
Last modified: November 21, 2017

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# Blank screen when saving custom CSS

 *  Resolved [n1fdadmin](https://wordpress.org/support/users/n1fdadmin/)
 * (@n1fdadmin)
 * [8 years, 5 months ago](https://wordpress.org/support/topic/blank-screen-when-saving-custom-css/)
 * When I try to add custom CSS to my TablePress configuration and hit save, I get
   a white, blank page in my browser. The change are not saved either. This functionality
   used to work fine and I have a number of custom CSS items stored – just cannot
   update anything.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fblank-screen-when-saving-custom-css%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 5 replies - 1 through 5 (of 5 total)

 *  Plugin Author [Tobias Bäthge](https://wordpress.org/support/users/tobiasbg/)
 * (@tobiasbg)
 * [8 years, 5 months ago](https://wordpress.org/support/topic/blank-screen-when-saving-custom-css/#post-9707949)
 * Hi,
 * thanks for your post, and sorry for the trouble.
 * The white page indicates that something on the server is raising an error. To
   find out more, please set the `WP_DEBUG` constant to `true` in your site’s wp-
   config.php file, via the instructions from [https://codex.wordpress.org/Editing_wp-config.php#Debug](https://codex.wordpress.org/Editing_wp-config.php#Debug)
   
   After that we should see more helpful error messages here.
 * Regards,
    Tobias
 *  Thread Starter [n1fdadmin](https://wordpress.org/support/users/n1fdadmin/)
 * (@n1fdadmin)
 * [8 years, 5 months ago](https://wordpress.org/support/topic/blank-screen-when-saving-custom-css/#post-9710178)
 * Thank you for getting back to me. Unfortunately, I can no longer reproduce this
   error. I did manage to capture the following error in our logs during the time
   when the problem was occurring –
 * Fatal Error: Error: Class ‘CSSTidy_custom_sanitize’ not found
    wp-content/plugins/
   tablepress/classes/class-css.php 79
 * I hope that this helps you to track down the problem.
 *  Plugin Author [Tobias Bäthge](https://wordpress.org/support/users/tobiasbg/)
 * (@tobiasbg)
 * [8 years, 5 months ago](https://wordpress.org/support/topic/blank-screen-when-saving-custom-css/#post-9710361)
 * Hi,
 * thanks for that! Are you maybe using the MailPoet plugin on your site? I recently
   saw that error message when MailPoet was involved.
 * Just to be sure: You can now save “Custom CSS” again without the error?
 * Regards,
    Tobias
 *  Thread Starter [n1fdadmin](https://wordpress.org/support/users/n1fdadmin/)
 * (@n1fdadmin)
 * [8 years, 5 months ago](https://wordpress.org/support/topic/blank-screen-when-saving-custom-css/#post-9710899)
 * Yes, I am using MailPoet 3 on our site. I can now save “Custom CSS” again without
   error and the changes see to be effecting my tables.
 *  Plugin Author [Tobias Bäthge](https://wordpress.org/support/users/tobiasbg/)
 * (@tobiasbg)
 * [8 years, 5 months ago](https://wordpress.org/support/topic/blank-screen-when-saving-custom-css/#post-9710980)
 * Hi,
 * ok, great! Thanks for the confirmation!
 * Best wishes,
    Tobias

Viewing 5 replies - 1 through 5 (of 5 total)

The topic ‘Blank screen when saving custom CSS’ is closed to new replies.

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 * 5 replies
 * 2 participants
 * Last reply from: [Tobias Bäthge](https://wordpress.org/support/users/tobiasbg/)
 * Last activity: [8 years, 5 months ago](https://wordpress.org/support/topic/blank-screen-when-saving-custom-css/#post-9710980)
 * Status: resolved